sporton



(No Model.) 2 Sheets- Sheet 1.

H. H. sPoHToN HHH. WHITE.

ROTARYFLUID METER.

No. 449,009. Patented Mar. 24, 1891.

-O0O0 000 0000 000 00Go 0000000 0G00 O90 0000 GOGO 0000 000 1000 060 Engl (No Model.) 2 Sheets-Sheet 2. H. H. SPORTON 8a' E. WHITE.

ROTARY FLUID METER.l

No. 449,009.v Patented Mar. 24, 1891.

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vUNITED TETES ATENT Errea.

ROTARY FLUID-METER.

SPECIFICATION forming part of Letters Patent No. 449,009, dated March 24, 1891.

Applicationpfilecl February l2, ISQO. Serial Nox 340,109. (No model.)

Our invention relates to fluid-meters of the kind described in the specification of British Letters Patent No. 13,395 of 1885, and in which the water or other fluid is caused to pass through a series of openings in such a manner as to impinge against the vanes of a fan arranged adjacent to the said openings and to rotate the same, the motion of which fan is utilized for operating the registering mechanism. The defect of such meters as hitherto constructed is that when only a small quantity of Huid is passing through them the streams or jets of fiuid issuing from the said openings do not impinge with sutcient force against the vanes of the fan to cause the rotation of the same. i

According to our present invention we arrange a second series of openings adjacent to the rst series, but of much smallerarea, and in connection with the first series of holes of large area we arrange a valve, which, when more than a given volume of fluid is flowing through the meter in a given time, is adapted to be raised by the pressure of the fluid itself, thereby allowing the fluid to issue through the series of large openings to rotate the fan. W'hen, however, the ow of Huid is below a given quantity in a given time it has not sufficient pressure to lift the said valve, it then passes only through the series of small openings, but at sufficient velocity to rotate the fan. The plate in which the two series of holes are formed is advantageously made re movable, and has formed integral with it the toe-piece or step, upon which the fan rotates.

To enable our invention to be fully understood, we will describe the same with reference to the accompanying drawings, :'-n which- Figure l is a sectional elevation of a meter embodying our improvements, and Fig. 2 is a similar view, illustrating the application of our invention to a meter of larger capacity than that shown in Fig. l.

Similar letters of reference indicate corresponding parts in both the figures.

a is the casing of the apparatus, which is provided with the inlet b and outlet c. d is the fan, and e is the plate, containing the series of small openings f and the series of large openings g, the said plate being` made removable and provided with the toe-piece 7L, upon which the fan is supported at its lower end. It will be noticed that the openings f are constantly in com muuication with the Huid-inlet7 so that the fluid can at all times pass through them, while the openings g communicate with a chamber e', the inlet to which is normally closed by a valve j. When, however, a large quantity of water or other uid is passing,the valve j is lifted by the pressure,the fluid entering through the inlet-passage and through the orifices 7c k beneath the valve-seat in the direction of' the arrows.

Z is a spring for normally retaining the valve upon its seat, and n is a cone screwed onto the stem of the said valve and serving to prevent the latter from becoming displaced upon its seat. vlith this eonstruction'it will be understood that when a large quantity of fluid is passing through the meter, not only does such fluid issue through the openings f, but also through the openings g, the valvej being lift-ed by the pressure. Vhen, however,- only a small quantity of fluid is passing, the pressure is not sufficient to raise the valve, so that the flow through the openings g is stopped, only the openings f serving for the flow of fluid.

As shown in the drawings, the series of openingsfis placed farther from the center of the fan than the series of openings g, the object of this arrangement being to allow the water to act upon the fan with greaterleverage than it would if the said openings fwere nearer to the center of the said fan.

m is a filter or strainer for preventing any solid matter from entering the meter.

In the modification ot our invention, shown in Fig. 2 the valve j, instead of being ar ranged beneath the plate c, as hereinbcfore described, is placed in a suitable chamber adjacent to the meter, and the series ot openings f communicate with a channel f', connected with the fluid-supply through the pipe IOO o, so that the fluid can pass at all times. \Vhen ay large quantity of fluid is passing', the valve j is raised, as hereinbefore described, whereby the fluid can enter the cllamberdbeneath the plate e, and thence flow through the openings g. In this modification the filter m is shown as being arranged immediately beneath the valve and supported by a flange, which serves as avalve-seat.

IIavin g now particularly described and ascertained the nature of the said invention, and in what manner the same is to be performed, we declare that what we claim isl. In a fluid-meter, the combination, with a fan, of a part provided with a separate series of large and small openings, each series having a dierent radial position in respect to said fan, and automa-tic means for control lingl the series of larger openings, substantially as described.

2. In a fluid-meter, the combination, with a fau, of a part provided with a separate series -Witnesses:

G. F. REDFERN, JOHN E. BOUSFIELD, Of the firm of G. F. Redfern U0., 4 South Street, lilzfnslmvy, London, Patent Agen/s. 

